Chemistry C3 3.0 / 5 based on 1 rating ? ChemistryGCSEOCR Created by: SarahCreated on: 21-12-12 14:45 What is an exothermic reaction? A reaction that gives out energy to the surroundings, usually in the form of heat. It is shown by the temperature rising 1 of 6 An example of an exothermic reaction Burning fuels 2 of 6 what is an endothermic reaction? A reaction that takes in energy from the surroundings usually in the form of heat. This is shown by the temperature lowering 3 of 6 what is an example of an endothermic reaction? thermal decomposition 4 of 6 what must happen to energy in order to break bonds? must be supplied 5 of 6 is bond breaking an endo or exothermic reaction, why? endothermic reaction because energy must be supplied to break the exit=sting bonds. 6 of 6
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